Helix AAC.3

Active high/low converter Helix AAC.3 (for OEM head units)

Integrating car hi‑fi components into existing OEM sound systems with an external amplifier is becoming increasingly challenging due to a lack of preamp outputs or the integration of speaker diagnostic functions. Enter the new Helix AAC.3. Forget about error messages or loss of functions (e.g., fader). The integrated ADEP.3P circuit cleverly "bypasses" speaker diagnostics in factory radios. It also prevents distorted sound and increased THD that can occur with conventional converters. Additionally, it does not unnecessarily load the head unit’s amplifier, reducing its current draw by up to 70%.

Intelligent signal detection

The "Double Activation Circuit" generates a +12 V remote turn‑on signal for powering connected aftermarket power amplifiers in two different ways. It either detects a DC offset on the speaker outputs of the OE amplifier or uses the built‑in, switchable signal detection with adjustable sensitivity. In addition, the AAC.3 features Audiotec Fischer’s own "Power Save Mode", which switches off the remote output if no music signal is present for more than 2 minutes. This is a big advantage, because many cars with CAN or similar bus architectures keep the audio system invisibly "alive" for up to 15 minutes even after you have left the vehicle.

Ready for high resolution

The AAC.3 HP generates a high‑quality preamp signal from the speaker output of the factory amplifier, enabling easy connection of additional power amplifiers. Its wide frequency response from 18 Hz to 80,000 Hz guarantees outstanding sound quality and makes this high‑resolution converter ready to reproduce high‑resolution audio.

Main features

• Enables easy connection of additional amplifiers to your factory sound system.
• Suitable for all head units — including those with factory‑installed amplifiers.
• "ADEP.3P circuit" for bypassing radio diagnostic systems.
• Microcontroller‑controlled monitoring of the music signal and generation of the remote turn‑on signal.
• "Power Save Mode" significantly reduces power consumption of connected amplifiers when no input signal is present (after 2 min.).
• "Double Activation Circuit" — generates a +12 V remote signal in two different ways to turn on connected amplifiers.
• Excellent sound quality thanks to a very wide frequency response (18 Hz - 80 kHz).
• High‑quality, sealed and gold‑plated RCA / Cinch connectors for lossless signal transmission.

About the brand

HELIX by Audiotec Fischer is a German brand of high‑end car audio equipment that has been among the world leaders in amplifiers and DSP processors for more than 35 years. HELIX is considered a pioneer in digital signal processors, offering some of the most advanced and highest‑quality DSP units in the world, allowing an experienced technician to tune any audio system to perfection and deliver an authentic hi‑fi experience in the car. The combination of precise German engineering, cutting‑edge technology and innovative design produces a clean, dynamic and detailed sound that has won the favor of audiophiles worldwide. HELIX products are characterized by high efficiency, reliability and perfect integration into modern vehicles. They are the ideal choice for demanding users who want the best possible sound without compromise. Helix, together with the Brax and Match brands, is part of the German manufacturer Audiotec Fischer.

Product comments

Evaluation

• Car amplifiers High/Low adapters - signal converters for connecting an amplifier to the original car radio
• German sound system manufacturer HELIX